The attack of Sept. 11, 2001, has been so pervasive a theme in American politics in the years since that at times we scarcely notice its influence even though it explains so much of what came after that day.

Sometimes almost forgotten, 9/11 is an experience some Americans may recall only when they travel and must undergo screening from a select few of the army of 45,000 screeners that was created by the actions of 19 suicidal hijackers.

So it was remarkable that three times in the space of two Senate hearings on Wednesday and Thursday, the 9/11 attack percolated through the discussion.

Testifying Thursday morning at his confirmation hearing before the Senate Foreign Relations Committee to be secretary of state, Sen. John Kerry, D-Mass., voiced his regret that one effect of that fateful day has been to make people abroad see American policy simply in terms of killing individual al Qaida leaders and pre-empting terrorist threats.